Dblogger：一个Python语言实现支持多进程和多线程日志打印高效Python日志库

日期	作者	版本	备注
2020-12-7	dingbin	v1.0

Dblogger: a powerful Python library supporting multi process and multi thread printing logs

Dblogger project implements a both multi-threads-safe and multi-process-safe logger library named dblogger in python language. It works well and has stable function and powerful performance,especially in multithreaded or multiprocessed Python programs.

Main interfaces of dblogger are implemented in file: smartlogger/utils.dblogger.py .

dblogger configuration file is: smartlogger/conf/logger.conf.

The dblogger configuration file has the following format:

[loggers]
keys=root,SafeLogger

[handlers]
keys=consoleHandler,fileHandler,rotatingFileHandler,timedRotatingFileHandler,truncateTimedRotatingFileHandler

[formatters]
keys=fmt0

[logger_root]
level=INFO
handlers=consoleHandler

[logger_SafeLogger]
level=INFO
#handlers=consoleHandler,truncateTimedRotatingFileHandler
handlers=truncateTimedRotatingFileHandler
qualname=SafeLogger
propagate=0

[handler_consoleHandler]
class=StreamHandler
args=(sys.stdout,)
level=INFO
formatter=fmt0

[handler_fileHandler]
class=FileHandler
args=("logs/app.log", "a")
level=INFO
formatter=fmt0

[handler_rotatingFileHandler]
class=handlers.RotatingFileHandler
args=("logs/app.log", 'a',100*1024*1024, 100)
level=INFO
formatter=fmt0


[handler_timedRotatingFileHandler]
class=handlers.TimedRotatingFileHandler
args=("logs/app.log", 'm', 1, 3600)
level=INFO
formatter=fmt0

[handler_truncateTimedRotatingFileHandler]
class=smartlogger.utils.logutils.truncate_timed_rotating_filehandler.TruncateTimedRotatingFileHandler
args=("logs/app.log", 'm', 1, 3600)
level=INFO
formatter=fmt0



[formatter_fmt0]
format=[%(asctime)s] [%(msecs)d,process(%(process)d),thread(%(thread)d),%(filename)s:%(lineno)d -- %(funcName)s() %(levelname)s] [%(message)s]
datefmt=%Y-%m-%d %H:%M:%S

TruncateTimedRotatingFileHandler was so important that it implements the following features: every few minutes or hours, it generates the log file name with a specific meaning, and then outputs the log content to the log file with the corresponding name. It was a truncated time rotating file handler and it's so useful.

You can run dblogger demo examples like this:

python -m smartlogger.loggerdemo.simpleloggerdemo
python -m smartlogger.utils.logutils.dbloggerdemo

Then you will see the rotating log files generated under directory: smartlogger/logs after run above demo commands. And the log file names may be like: app.log and app.log.2020-11-08_01-01 and so on.

See GitHub address: https://github.com/apollo008/dblogger for source code and details.